package com.mmall.util;

import java.math.BigDecimal;

public class BigDecimalUtil {

    private BigDecimalUtil(){

    }

    //两个参数的和
    public static BigDecimal add(double v1,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.add(b2);
    }

    // 两个参数的差
   public static BigDecimal sub(double v1,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.subtract(b2);
    }

    // 两个参数的积
    public static BigDecimal mul(double v1,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));
        return b1.multiply(b2);
    }

    // 两个参数的商
    public static BigDecimal div(double v1,double v2){
        BigDecimal b1 = new BigDecimal(Double.toString(v1));
        BigDecimal b2 = new BigDecimal(Double.toString(v2));

        //除不尽的情况，四舍五入，保留两位小数
        return b1.divide(b2,2,BigDecimal.ROUND_HALF_UP);
    }
}
